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IFD244, IFD258 · Edition 06.23

EN-8

The display blinks and indicates 01?

The IFD has detected an incorrect ﬂame signal

without the burner having been ignited (extrane-

ous signal)–

Flame signal through ceramic insulation–

IFD258:

The UV tube in the UV sensor UVS is defective

(service life ended) and permanently indicates an

extraneous signal.

• Exchange UV tube, Order No.: 04065304 –

note the Operating instructions for UV sensor

UVS.

• Increase value of parameter 04 in order to

adapt the switch-off threshold of the ﬂame

ampliﬁer.

0 2

Start-up – no gas supply – the display blinks

and indicates 02?

The gas valve does not open –

• Check voltage supply to the gas valve.

➔ After a short-circuit on the valve output, the

internal fuse in the unit tripped. The fuse cannot

be replaced. Return the unit to the manufacturer

for inspection.

There is still air in the pipeline, for example after

installation work or if the system has not been

used for a long period–

• “Purge” the pipeline and reset the system

several times.

Start-up – ﬂame burning – nevertheless, the

display blinks and indicates 02?

Flame failure on start-up.

• Read off the ﬂame signal (parameter 01) – see

page 10 (12 Reading off the ﬂame signal

and the parameters).

If the ﬂame signal is lower than the switch-off

threshold (parameter 04), this may be attribut-

able to the following causes:

Short-circuit on the ﬂame rod as the result of

soot, dirt or moisture on the insulator–

Flame rod not correctly positioned at the ﬂame

edge–

Gas/air ratio incorrect –

Flame not contacting burner ground as the result

of excessively high gas or air pressure–

Burner or IFD not (adequately) grounded –

Short-circuit or discontinuity on the ﬂame signal

cable–

IFD244:

Phase (L1) and neutral conductor (N) reversed –

• Connect L1 to terminal 1 and N to terminal 2.

IFD258:

The set value for the cut-off sensitivity is too

high–

Soiled UV sensor –

• Remedy fault.

Start-up – no ignition spark and no gas

supply – the display blinks and indicates 02?

Short-circuit on the ignition or valve output –

• Check the wiring.

• Replace ﬁne-wire fuse: 3.15A, slow-acting, H.

2 20

µA (DC)

T3,15A H

➔ The fuse only protects the ignition output! After a

short-circuit on the valve output, an internal fuse

in the unit trips, which cannot be changed. Re-

turn the unit to the manufacturer for inspection.

Checking the safety function

• Close the manual valve.

• Start the automatic burner control unit several

times and check that it operates safely.

• If it does not operate correctly, return the auto-

matic burner control unit to the manufacturer.

0 4

Operation – ﬂame burning – burner inter-

rupted– the display blinks and indicates 04?

Flame failure during operation.

• Read off the ﬂame signal (parameter 01 ) – see